Redox initiation system for acrylic adhesives

Abstract

A curable composition including a reactive monomer or oligomer with acrylate functionality, an amine, and an alkyl peroxide. The alkyl peroxide is free or substantially free of phenyl rings. The alkyl peroxide can be dilauroyl peroxide (DLP). The curable composition can also include 3,5-diethyl-1,2-dihyrdro-1-phenyl-2-propylpyridine (PDHP). The curable composition can be provided as a two-part adhesive composition, including an A-side with DLP and an acrylic monomer, and a B-side with PDHP.

1 . A curable composition, the composition comprising:
 a reactive monomer or oligomer, the reactive monomer or oligomer having acrylate functionality;   an amine; and   an alkyl peroxide, the alkyl peroxide being free or substantially free of phenyl rings.   
     
     
         2 . The composition of  claim 1 , wherein the alkyl peroxide comprises an alkyl diacyl peroxide. 
     
     
         3 . The composition of  claim 1 , wherein the alkyl peroxide comprises dilauroyl peroxide (DLP). 
     
     
         4 . The composition of  claim 1 , further comprising 3,5-diethyl-1,2-dihyrdro-1-phenyl-2-propylpyridine (PDHP). 
     
     
         5 . The composition of  claim 1 , wherein the composition is substantially free from any phenyl containing constituents. 
     
     
         6 . The composition of  claim 1 , wherein the composition is cured. 
     
     
         7 . The composition of  claim 1 , wherein the composition is substantially free from benzene or benzene derivatives. 
     
     
         8 . The composition of  claim 1 , wherein the composition is completely free from benzene or benzene derivatives. 
     
     
         9 . The composition of  claim 1 , wherein the composition comprises low or substantially no residual aldehyde content or residue. 
     
     
         10 . The composition of  claim 9 , wherein the composition has less than about 100 ppm aldehyde content or residue. 
     
     
         11 . The composition of  claim 1 , wherein the composition further comprises diisopropanol toluidine and dimethyl piperazine. 
     
     
         12 . The composition of  claim 3 , wherein the DLP is present from about 0.5 weight percent to about 5.0 weight percent based on the total weight of the composition 
     
     
         13 . The composition of  claim 12 , wherein the DLP is present at about 1.0 weight percent to about 2.5 weight percent based on a total weight of the composition. 
     
     
         14 . The composition of  claim 4 , wherein the PDHP is present from about 0.01 weight percent to about 1.0 weight percent based on a total weight of the composition. 
     
     
         15 . The composition of  claim 14 , wherein the PDHP is present at about 0.1 weight percent based on the total weight of the composition. 
     
     
         16 . The composition of  claim 1 , the composition comprising a two-part adhesive, the two part-adhesive comprising the DLP and the acrylic monomer in an A-side, and the PDHP in a B-side. 
     
     
         17 . The composition of  claim 16 , further comprising a stabilizer. 
     
     
         18 . The composition of  claim 17 , wherein the stabilizer comprises Ethanox 330. 
     
     
         19 . A two-part adhesive composition, the two-part adhesive composition comprising:
 an A-side comprising dilauroyl peroxide (DLP) and an acrylic monomer; and   a B-side comprising 3,5-diethyl-1,2-dihyrdro-1-phenyl-2-propylpyridine (PDHP).   
     
     
         20 . The two-part adhesive composition of  claim 19 , further comprising a stabilizer. 
     
     
         21 . The two-part adhesive composition of  claim 20 , wherein the stabilizer comprises Ethanox 330. 
     
     
         22 . The two-part adhesive composition of  claim 19 , wherein the DLP is present from about 0.5 weight percent to about 5.0 weight percent based on a total weight of the composition. 
     
     
         23 . The two-part adhesive composition of  claim 19 , wherein the DLP is present at about 1.0 weight percent to about 2.5 weight percent based on a total weight of the composition. 
     
     
         24 . The two-part adhesive composition of  claim 19 , wherein the PDHP is present from about 0.01 weight percent to about 1.0 weight percent based on a total weight of the composition. 
     
     
         25 . The two-part adhesive composition of  claim 19 , wherein the PDHP is present at about 0.1 weight percent based on a total weight of the composition. 
     
     
         26 . The two-part adhesive composition of  claim 19 , wherein the composition is substantially free from any phenyl containing constituents. 
     
     
         27 . The two-part adhesive composition of  claim 19 , wherein the composition is substantially free from benzene or benzene derivatives. 
     
     
         28 . The two-part adhesive composition of  claim 19 , wherein the composition comprises low or substantially no residual aldehyde content or residue, optionally wherein the composition has less than about 100 ppm aldehyde content or residue. 
     
     
         29 . The two-part adhesive composition of  claim 19 , wherein the composition further comprises diisopropanol toluidine and dimethyl piperazine.